Alpha HSS Tap UNC Bottoming-3/4x10 UNCHB34BOTTOMING taps have a lead of two threads and are used when tapping blind holes. Usually preceded by a taper or intermediate tap. Alpha bottoming taps can be identified by their plain shaft, they have no rings on the shaft near the driving square. Diameter: 3 4mm Pitch: 10mm Overall length: 95mm Shaft Diameter: 14mm Drive Square: 11mm Tapping Drill Size: 16. 50mm Weight (gr) 130. 00
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